How to use this checklist
Work through the 10 items across Measurement, Budget, and Preparation. The Measurement items are the foundation — without accurate wall area (perimeter × height for standard 8-foot ceilings), subtracting roughly 20 sq ft per door and 15 sq ft per window, you can't compute how much paint you need. The paint calculation itself is straightforward: wall area ÷ 350-400 sq ft per gallon × number of coats (almost always 2), plus 10% for touch-ups. Be honest about Budget items — the price-tier gap between $15-25/gal budget paint and $30-50/gal mid-range is the single biggest predictor of coverage, durability, and how many coats you'll actually apply.
What your result means
80%+ means the project is scoped, budgeted, and prepped correctly. 50-79% typically signals gaps in Preparation — most often un-repaired wall damage (nail holes, cracks, drywall patches sanded smooth), un-taped trim and ceiling lines, or furniture and floors not covered with canvas drop cloths. Below 50% usually means measurement and budget aren't pinned down; without a real paint-volume calculation you're guessing at the budget and likely to make multiple trips to the store mid-project. Primer is the most often skipped item that shouldn't be — painting over dark colors, bare drywall, spackle, or glossy surfaces without primer means the top coat won't adhere properly and you'll need a third coat.
When to trust it
This checklist covers a standard interior repaint of an owner-occupied home. It does not address lead paint (present in all US homes built before 1978 — sanding or disturbing it requires EPA RRP-certified contractors and is illegal for DIY in many jurisdictions), asbestos-containing popcorn ceilings (common in homes built 1950-1980 — never sand or scrape without testing), vaulted or stairwell ceilings requiring scaffolding, or structural wall damage hiding behind drywall. For spaces with poor ventilation, chemical sensitivities, pregnancy, or young children, choose low- or zero-VOC paint and ventilate for 48-72 hours after painting. Exterior painting, cabinet refinishing, and decorative finishes (faux, lacquer, spray equipment) warrant a licensed painting contractor — the prep, equipment, and material science are different.
Frequently Asked Questions
How much should I budget beyond the paint itself?
For a typical DIY room, the non-paint kit runs $60-120: rollers and sleeves, angled brush for cutting in, painter's tape, drop cloths, spackle and primer for wall repair, and a sturdy stepladder if you don't own one. The bigger hidden line is prep-material quantity — rooms with repairs or dark-to-light color changes may need a full extra gallon of primer. If you're hiring out, labor is typically 70-80% of the total quote; the paint itself is the smallest part of any painting budget.
Should I paint myself or hire painters?
Paint it yourself when the rooms are standard height, the colors are forgiving, and your time isn't the bottleneck — the skill floor for a good-looking room is a weekend of YouTube and patience. Hire out for vaulted ceilings and stairwells (fall risk is real), heavy texture or wallpaper removal, fast whole-house turnovers, or when you need a hard deadline met. The middle path many people miss: paint the walls yourself and hire just the ceiling and trim — the two most miserable, skill-heavy parts.
When is cheap paint a false economy?
When coverage is the difference. Budget paints often need three coats where a premium line covers in one or two — at which point you've spent more per square foot and tripled your labor. The cheap tier also scuffs and washes worse in high-touch areas. Rule of thumb from professional painters: go mid-tier or better for anything dark, bright, or red (pigment-heavy colors show cheapness most), walls you'll wipe (kids, kitchens, hallways), and exteriors. The one-gallon bathroom in a light color? Cheap paint is fine there.